L2VPN Configuration Guide for Cisco 8000 Series Routers, Cisco IOS XR Releases
Explains the flooding disable feature, providing guidance on configuration steps to control unwanted broadcast and unknown traffic within bridge domains.
A flooding disable feature is a bridge-level forwarding control that
prevents forwarding of broadcast, unknown-unicast, and multicast traffic on a bridge domain
can disable flooding of BUM traffic at the bridge level, and
can also disable only unknown-unicast traffic at the bridge level.
Prevent unwanted traffic flooding within a bridge domain by selectively disabling flooding for BUM (broadcast, unknown-unicast, and multicast) traffic or unknown-unicast traffic.
You can improve network performance and control how traffic is handled by disabling flooding of BUM traffic or unknown-unicast traffic at the bridge domain level. Disabling unknown-unicast flooding only applies when BUM flooding disable is not configured.
Follow these steps to configure either flooding disable behavior.
| 1. | Disable flooding of BUM traffic at the bridge level. Example: |
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| 2. | Disable flooding of unknown-unicast traffic at the bridge level when BUM flooding disable is not configured. Example: |
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| 3. | Review the running configuration. Example: |
The bridge domain uses the specified flooding-disable setting, effectively controlling network traffic as desired.